太阳氧同位素异常与太阳系的原始环境
Oxygen isotope anomalies of the Sun and the original environment of the Solar system
摘要：
我们目前的结果，从一个模型的氧同位素异常生产通过选择性光解的CO内塌陷的原太阳云。我们的模型产生了一个原太阳与广泛的Delta_17O值取决于紫外线辐射场的强度。最近两次太阳风氧同位素测量的结果截然不同，这表明太阳氧同位素的组成可能有多种。然而，受彗星和陨石的其他测量的限制，我们的模型意味着太阳诞生在一个具有增强辐射场的星团中，因此与陨石中60 Fe的超新星源一致。
英文摘要：
We present results from a model of oxygen isotopic anomaly production through selective photodissociation of CO within the collapsing proto-Solar cloud. Our model produces a proto-Sun with a wide range of Delta_17O values depending on the intensity of the ultraviolet radiation field. Dramatically different results from two recent Solar wind oxygen isotope measurements indicate that a variety of compositions remain possible for the solar oxygen isotope composition. However, constrained by other measurements from comets and meteorites, our models imply the birth of the Sun in a stellar cluster with an enhanced radiation field and are therefore consistent with a supernova source for 60Fe in meteorites.
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